Get a iPhone out of the two. However if you want a under powered pen test tool to crack wep and steal passwords with a crappy resistive touch screen that has no official support by Nokia and a USB conector that will eventually break off get the n900. I have one but that thing is showing its age. Android might be a good option.

There is always better and a jailbroken iPhone is a better experience out the 2 and if you want new apps don't bother with n900 unless you know how to cross compile. You'll be dependent on devs on forums like these

You might as well buy a HP touchpad for $99 if you go for a n900. There is a reason its so cheap..,

http://www.forbes.com/sites/briancau...touchpad-dont/